Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7123951 | Measurement | 2016 | 9 Pages |
Abstract
Longitudinal heat conduction is an important parameter in the cryogenic field, especially in cryogenic heat exchangers. In the present study, the parasitic effect of tube wall longitudinal heat conduction on temperature measurement within the tube has been studied for cryogenic gas with low mass flow rates by finite element method and experimental tests. The effects of various parameters such as tube outlet temperature, tube wall thermal conductivity, mass flow rate, and tube wall thickness have been investigated. Axial positioning errors of temperature sensor due to tube wall longitudinal heat conduction were higher for lower gas flow rates. The results showed that the tube wall thermal conductivity leads to axial heat conduction within the tube wall, but the higher tube wall thermal conductivity does not lead to bigger axial positioning error of temperature sensor at tube outlet. According to data obtained from simulations and experiments, sensor with distance of 5Â mm from tube outlet had 14.92% and 8.51% temperature measurement error (with respect to gas flow temperature at tube outlet) for tube wall thermal conductivities of 16 and 400Â WÂ mâ1Â Kâ1, respectively.
Related Topics
Physical Sciences and Engineering
Engineering
Control and Systems Engineering
Authors
Ali Saberimoghaddam, Mohammad Mahdi Bahri Rasht Abadi,